CN102674730A - Surface treating agent of recycled aggregate and preparation method thereof - Google Patents
Surface treating agent of recycled aggregate and preparation method thereof Download PDFInfo
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- CN102674730A CN102674730A CN2012101843176A CN201210184317A CN102674730A CN 102674730 A CN102674730 A CN 102674730A CN 2012101843176 A CN2012101843176 A CN 2012101843176A CN 201210184317 A CN201210184317 A CN 201210184317A CN 102674730 A CN102674730 A CN 102674730A
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- regeneration aggregate
- surface treatment
- treatment agent
- recycled aggregate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a surface treating agent of recycled aggregate. The surface treating agent is mainly prepared by the following raw materials by weight: 0.5-1.5% of polyvinyl alcohol, 4-10% of sodium silicate, 0.5-3% of urea, 0.2-1% of sodium fluosilicate and 88-93.8% of water. The surface treating agent has the advantages of being capable of improving surface state of the recycled aggregate and remarkably reducing water absorption rate of the recycled aggregate by utilizing the polyvinyl alcohol, sodium silicate and sodium fluosilicate which are good in film formation performance, utilizing sodium silicate and sodium fluosilicate solution to fill holes and micro cracks of the recycled aggregate and obviously improving strength of the recycled aggregate accordingly. In addition, when the recycled aggregate is processed and used for preparing concrete, the film-shaped sodium silicate and sodium fluosilicate on the surface of the recycled aggregate and cement are hydrated to be subjected to calcium hydroxide reaction to produce calcium silicate and calcium fluosilicate which are capable of remarkably improving strength of a concrete transition area and improving bounding performance between the aggregate and cement stone.
Description
Technical field
The present invention relates to building material technical field, relate in particular to a kind of compound method of regenerated coarse aggregate surface treatment agent.
Background technology
Along with developing rapidly of construction industry, the building waste that is produced by construction industry sharply increases, and environment has been produced considerable influence, and society has been caused certain harm.Discarded concrete is handled the back as regeneration aggregate through fragmentation, removal of impurities, classification etc.; Not only can solve the environmental pollution that discarded concrete brings; Can also practice thrift the natural aggregate resource, thereby reduce exploitation, fundamentally solve the scarcity day by day of natural aggregate and the environmental disruption problem that a large amount of sandstone exploitation brings natural sandstone; Protect existent environment of people, met the requirement of Sustainable development.
Be wrapped in a considerable amount of hardened cement mortars by discarded concrete through the regeneration aggregate surface that break process produces, cause that the regeneration aggregate corner angle are more, surface irregularity, water-intake rate are high, a little less than the viscosifying power; And regeneration aggregate is inner to produce microfracture because damage in shattering process accumulation makes, thereby causes self intensity of regeneration aggregate lower, and the crush values index is higher.Therefore the range of application of regeneration aggregate is also very narrow at present, low intensive concrete in mainly being used for preparing.If will widen its range of application, regeneration aggregate is used in the reinforced concrete work gone, then must carry out certain pre-treatment to regeneration aggregate.
Current pretreatment process mainly contains mechanical activation and two kinds of approach of chemical modification.Mechanical activation is through the regeneration gravel particle a little less than destroying and remove the low-strength cement stone residue that adheres on the rubble, thereby improves the particle shape and the surfaceness of regeneration aggregate.Chemical process then adopts polymkeric substance or grout to handle regeneration aggregate.Polymers soln or the cement grout good with allotment soak and drying treatment regeneration aggregate respectively; Test shows; Slurries can be filled its inner some microfractures that produce in hole and the bonding shattering process of regeneration aggregate (polymer slurries can also at the regeneration aggregate surface filming) to a certain extent; Reduce the water-absorbent of regeneration aggregate, the intensity of strengthening back regeneration aggregate self obtains raising to a certain degree.
Because some defectives of these treatment processs self inherent also are in the laboratory study stage at present, mass-producing is not used as yet.The mechanical activation facture not only can consume lot of energy, and can produce a large amount of reluctant powder; The polymer slurries good film-forming property can significantly reduce the aggregate water-absorbent, but not obvious to the reinforcing effect of aggregate, the cement grout reinforced effects is obvious, but the aggregate water absorbing properties can not significantly reduce.
Summary of the invention
Goal of the invention: to the deficiency of above-mentioned prior art, the technical problem that the present invention will solve provides a kind of regeneration aggregate surface treatment agent that can significantly reduce aggregate water absorbing properties and raising aggregate intensity.
Technical scheme: in order to solve the problems of the technologies described above; The technical scheme that the present invention adopted is: a kind of regeneration aggregate surface treatment agent; Mainly process: Z 150PH 0.5-1.5%, water glass 4-10%, urea 0.5-3% by following raw materials by weight percent; Sodium Silicofluoride 98min 0.2-1%, water 88-93.8%.
Among the present invention, the polymerization degree scope of said Z 150PH is 17-24.It can significantly improve the toughness and the water resistance of organic/inorganic composite film, and when mixing the system concrete, effectively reduces the dissolution rate of film, makes regeneration aggregate in premixing and construction process, keep lower water-intake rate.
Among the present invention, said water glass is that modulus is the industrial-grade sodium silicate of 3.0-3.5.It can form glass mulch film on the regeneration aggregate surface; And regeneration aggregate hole and tiny crack are effectively filled; Improve the intensity of regeneration aggregate, after concrete hardening, the calcium hydroxide that membranaceous water glass and hydrated cementitious produce is sent out and should be generated Calucium Silicate powder; Can significantly improve the intensity of concrete zone of transition, increase the bonding capacity between aggregate and the cement stone.
Among the present invention, said urea is to contain N>46% industrial goods or agricultural article, it can improve the solubleness of water glass and Sodium Silicofluoride 98min, and can improve the toughness of water glass and Sodium Silicofluoride 98min film.
Among the present invention, said Sodium Silicofluoride 98min is analytically pure chemical reagent.It can form glass mulch film on the regeneration aggregate surface, and regeneration aggregate hole and tiny crack are effectively filled, and improves the intensity of regeneration aggregate, and its reinforced effects surpasses water glass; After concrete hardening, the calcium hydroxide that membranaceous Sodium Silicofluoride 98min and hydrated cementitious produce is sent out and should be generated calcium silicofluoride, can significantly improve the intensity of concrete zone of transition, increases the bonding capacity between aggregate and the cement stone.
Among the present invention, the water that adopts is the municipal tap water.
The compound method of above-mentioned regeneration aggregate surface treatment agent, this method comprises the steps:
(1) dissolve polyvinyl alcohol: in 20 ℃ of water, slowly add Z 150PH earlier, and constantly stir, add the Z 150PH continued and stirred 10-15 minute; Be warming up to 90-95 ℃ then; TRT was controlled at 60-90 minute, kept 60-90 minute at temperature 90-95 ℃, obtained polyvinyl alcohol solution; Then solution is cooled to room temperature;
(2) load weighted water glass, urea, Sodium Silicofluoride 98min are dissolved in the polyvinyl alcohol solution for preparing in proportion, promptly obtain said regeneration aggregate surface treatment agent.
Beneficial effect: compared with prior art; Advantage of the present invention is: the optimization through adopting good high-molecular polyvinyl alcohol solution of film-forming type and water glass, silicofluoric acid mineral solution is compound; Make regeneration aggregate surface form mechanical property, toughness, organic/inorganic composite film that water-repellancy is all good, significantly reduced the water-intake rate of regeneration aggregate; Utilize the Z 150PH very low advantage of solvability at normal temperatures, when mixing the system concrete, effectively reduce the dissolution rate of organic/inorganic composite film, make regeneration aggregate in premixing and construction process, keep lower water-intake rate; Utilize water glass and sodium fluoride solution that regeneration aggregate hole and tiny crack are effectively filled, obviously improved the intensity of regeneration aggregate; In addition; Regeneration aggregate is after treatment during concrete batching; The calcium hydroxide that water glass that the surface is membranaceous and Sodium Silicofluoride 98min and hydrated cementitious produce is sent out and should be generated Calucium Silicate powder and calcium silicofluoride, can significantly improve the intensity of concrete zone of transition, increases the bonding capacity between aggregate and the cement stone.
Embodiment
Through concrete embodiment the present invention is further specified below; Should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the principle of the invention; Can also make some modification and improvement, these also should be regarded as belonging to protection scope of the present invention.
Embodiment 1: a kind of regeneration aggregate surface treatment agent, mainly process: Z 150PH 1%, water glass 5%, urea 1%, Sodium Silicofluoride 98min 0.8%, water 92.2% by the starting material of following weight percent.
In above-mentioned each starting material, its polymerization degree of Z 150PH is 17; Water glass is that modulus is 3.0 industrial-grade sodium silicate; Urea is to contain N>46% agricultural article; Sodium Silicofluoride 98min is analytically pure chemical reagent.
The compound method of above-mentioned regeneration aggregate surface treatment agent is:
The first step is carried out weighing according to above-mentioned raw-material proportioning, and is subsequent use;
Second step, dissolve polyvinyl alcohol: at first heat water to 20 ℃, in 20 ℃ of water, slowly add Z 150PH then; And constantly stir, add the Z 150PH continued and stirred 10 minutes, be warming up to 90-95 ℃ then; TRT was controlled at 60-90 minute; In the time of 90-95 ℃, keep constant temperature 60 minutes, obtain polyvinyl alcohol solution, then this solution is cooled to room temperature.
The 3rd step was dissolved in water glass, urea, Sodium Silicofluoride 98min in the polyvinyl alcohol solution for preparing, and promptly obtained the regeneration aggregate surface treatment agent.
Embodiment 2: a kind of regeneration aggregate surface treatment agent, mainly process: Z 150PH 1.5%, water glass 6%, urea 2%, Sodium Silicofluoride 98min 1%, water 89.5% by the starting material of following weight percent.
In above-mentioned each starting material, its polymerization degree scope of Z 150PH is 24; Water glass is that modulus is 3.5 industrial-grade sodium silicate; Urea is to contain N>46% agricultural article; Sodium Silicofluoride 98min is analytically pure chemical reagent.
The compound method of above-mentioned regeneration aggregate surface treatment agent is:
The first step is carried out weighing according to above-mentioned raw-material proportioning, and is subsequent use;
Second step, dissolve polyvinyl alcohol: at first heat water to 20 ℃, in 20 ℃ of water, slowly add Z 150PH then; And constantly stir, add the Z 150PH continued and stirred 15 minutes, be warming up to 90-95 ℃ then; TRT was controlled at 60-90 minute; In the time of 90-95 ℃, keep constant temperature 90 minutes, obtain polyvinyl alcohol solution, then this solution is cooled to room temperature.
The 3rd step was dissolved in water glass, urea, Sodium Silicofluoride 98min in the polyvinyl alcohol solution for preparing, and promptly obtained the regeneration aggregate surface treatment agent.
Embodiment 3: a kind of regeneration aggregate surface treatment agent, mainly process: Z 150PH 1.2%, water glass 6%, urea 1.8%, Sodium Silicofluoride 98min 1%, water 90% by the starting material of following weight percent.
In above-mentioned each starting material, its polymerization degree scope of Z 150PH is 20; Water glass is that modulus is 3.2 industrial-grade sodium silicate; Urea is to contain N>46% industrial goods; Sodium Silicofluoride 98min is analytically pure chemical reagent.
The compound method of above-mentioned regeneration aggregate surface treatment agent is:
The first step is carried out weighing according to above-mentioned raw-material proportioning, and is subsequent use;
Second step, dissolve polyvinyl alcohol: at first heat water to 20 ℃, in 20 ℃ of water, slowly add Z 150PH then; And constantly stir, add the Z 150PH continued and stirred 12 minutes, be warming up to 90-95 ℃ then; TRT was controlled at 60-90 minute; In the time of 90-95 ℃, keep constant temperature 70 minutes, obtain polyvinyl alcohol solution, then this solution is cooled to room temperature.
The 3rd step was dissolved in water glass, urea, Sodium Silicofluoride 98min in the polyvinyl alcohol solution for preparing, and promptly obtained the regeneration aggregate surface treatment agent.
By embodiment 1 to 3 prepared regeneration aggregate surface treatment agent; Its each item performance index can detect through following method: the intensity of regeneration aggregate reflects through the crush values of aggregate, establishing criteria: regular concrete sand, stone quality and test method standard JGJ52-2006; The water-intake rate index of regeneration aggregate is through reacting establishing criteria with general aggregate at the water demand ratio that the system of mixing reaches identical workability during concrete: Standard for test methods of properties of ordinary concrete mixture standard GB/T50080-2002; The increase of the water-intake rate of regeneration aggregate in the system of mixing and construction process through with the slump of normal concrete through the time lose and relatively react establishing criteria: Standard for test methods of properties of ordinary concrete mixture standard GB/T50080-2002; Net effect can react establishing criteria through the concrete 28d intensity contrast of preparation: standard for test methods of mechanical properties of ordinary concrete GB/T50081-2002.
It is as follows to mix system concrete used other starting material and proportioning:
The specific surface area of PO42.5 cement is 340 m
2/ kg, 28d ultimate compression strength 48.5 Mpa; Breeze is the S95 breeze, and its specific surface area is 410 m
2/ kg, the 28d activity index is 102; Flyash is I level flyash, its fineness (45um screen over-size) 7%; Sand is II district medium sand, and fineness modulus is 2.6; Stone is common rubble, undressed regeneration aggregate, surface treated regeneration aggregate, and grain composition is 5-25; The JM-10 high efficiency water reducing agent that admixture is produced for Bo Te company;
Proportioning such as following table:
| Starting material | Cement | Breeze | Flyash | Sand | Stone | Admixture |
| Quality (Kg) | 240 | 60 | 60 | 780 | 1080 | 5.5 |
Implementation result such as following table:
| Embodiment | 1 | 2 | 3 | Unprocessed |
| Crush values | 13.8 | 12.8 | 13.5 | 15.5 |
| Water consumption (Kg) | 178 | 172 | 175 | 205 |
| The slump | 180 | 180 | 180 | 180 |
| The slump behind the 1h | 140 | 155 | 150 | 50 |
| 28d ultimate compression strength (Mpa) | 33.9 | 35.4 | 34.3 | 25.3 |
From table, can find out; Regeneration aggregate obviously improves through its performance after the surface treatment, contrasts undressed regeneration aggregate, and water consumption and slump-loss value are improved particularly evident; This regeneration aggregate surface treatment agent excellent property is described, good prospects for application is arranged.
Embodiment 4: basic identical with embodiment 1, different is raw-material composition: Z 150PH 0.5%, water glass 10%, urea 0.5%, Sodium Silicofluoride 98min 0.2%, water 88.8%.
Embodiment 5: basic identical with embodiment 1, different is raw-material composition: Z 150PH 1%, water glass 4%, urea 1%, Sodium Silicofluoride 98min 0.2%, water 93.8%.
Embodiment 6: basic identical with embodiment 1, different is raw-material composition: Z 150PH 1%, water glass 7%, urea 3%, Sodium Silicofluoride 98min 1%, water 88%.
Claims (6)
1. a regeneration aggregate surface treatment agent is characterized in that, is mainly processed by following raw materials by weight percent: Z 150PH 0.5-1.5%, water glass 4-10%, urea 0.5-3%, Sodium Silicofluoride 98min 0.2-1%, water 88-93.8%.
2. regeneration aggregate surface treatment agent according to claim 1 is characterized in that, the polymerization degree scope of said Z 150PH is 17-24.
3. regeneration aggregate surface treatment agent according to claim 1 is characterized in that, said water glass is that modulus is the industrial-grade sodium silicate of 3.0-3.5.
4. regeneration aggregate surface treatment agent according to claim 1 is characterized in that, said urea is to contain N>46% industrial goods or agricultural article.
5. regeneration aggregate surface treatment agent according to claim 1 is characterized in that, said Sodium Silicofluoride 98min is analytically pure chemical reagent.
6. the compound method of regeneration aggregate surface treatment agent according to claim 1 is characterized in that, this method comprises the steps:
(1) dissolve polyvinyl alcohol: in 20 ℃ of water, slowly add Z 150PH earlier, and constantly stir, add the Z 150PH continued and stirred 10-15 minute; Be warming up to 90-95 ℃ then; TRT was controlled at 60-90 minute, kept 60-90 minute at temperature 90-95 ℃, obtained polyvinyl alcohol solution; Then solution is cooled to room temperature;
(2) load weighted water glass, urea, Sodium Silicofluoride 98min are dissolved in the polyvinyl alcohol solution for preparing in proportion, promptly obtain said regeneration aggregate surface treatment agent.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936318A (en) * | 2014-03-18 | 2014-07-23 | 沈阳建筑大学 | Waste fiber recycled aggregate concrete able to improve aggregate performance and preparation method thereof |
| CN104072201A (en) * | 2014-07-07 | 2014-10-01 | 江苏名和集团有限公司 | Modification method of light clay aggregates |
| CN104261757A (en) * | 2014-09-10 | 2015-01-07 | 江苏名和集团有限公司 | Sintering-free lightweight aggregate and preparation method thereof |
| CN104860562A (en) * | 2015-05-14 | 2015-08-26 | 河北科技大学 | Method for preparing waterproof thermal insulation type recycled aggregates |
| CN105461249A (en) * | 2016-02-01 | 2016-04-06 | 西安建筑科技大学 | Production technology and device for preparing recycled building materials through construction waste |
| CN106565121A (en) * | 2016-10-19 | 2017-04-19 | 山西省交通科学研究院 | A surface treatment method for waste cement concrete regenerated aggregate |
| CN108947401A (en) * | 2018-08-16 | 2018-12-07 | 中建西部建设西南有限公司 | A kind of anti-block water permeable concrete |
| CN109053058A (en) * | 2018-10-15 | 2018-12-21 | 金陵科技学院 | The method for preparing high-performance building mortar using the artificial fine aggregate of solid waste |
| CN109748528A (en) * | 2019-02-22 | 2019-05-14 | 湖南鑫长胜材料科技有限公司 | A kind of regenerated aggregate hardening agent and enhanced processing method |
| CN110482895A (en) * | 2019-09-23 | 2019-11-22 | 广西壮族自治区水利科学研究院 | A kind of method of modifying of recycled aggregate |
| CN112321184A (en) * | 2020-11-16 | 2021-02-05 | 江苏金海宁新型建材科技有限公司 | Preparation method of recycled aggregate for prefabricated building |
| CN112374827A (en) * | 2020-09-16 | 2021-02-19 | 湖州上建华煜混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
| CN112624710A (en) * | 2021-01-15 | 2021-04-09 | 深圳市宝金华混凝土有限公司 | High-strength recycled concrete and preparation method thereof |
| CN113603430A (en) * | 2021-09-07 | 2021-11-05 | 河北金铎建设工程有限公司 | Thermal insulation wall protective layer dry material, mortar and wall |
| CN113620668A (en) * | 2021-09-06 | 2021-11-09 | 深圳市永恒业混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
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| CN103936318B (en) * | 2014-03-18 | 2016-01-20 | 沈阳建筑大学 | Waste fiber regenerated aggregate concrete that can improve aggregate performance and preparation method thereof |
| CN103936318A (en) * | 2014-03-18 | 2014-07-23 | 沈阳建筑大学 | Waste fiber recycled aggregate concrete able to improve aggregate performance and preparation method thereof |
| CN104072201A (en) * | 2014-07-07 | 2014-10-01 | 江苏名和集团有限公司 | Modification method of light clay aggregates |
| CN104261757A (en) * | 2014-09-10 | 2015-01-07 | 江苏名和集团有限公司 | Sintering-free lightweight aggregate and preparation method thereof |
| CN104860562A (en) * | 2015-05-14 | 2015-08-26 | 河北科技大学 | Method for preparing waterproof thermal insulation type recycled aggregates |
| CN104860562B (en) * | 2015-05-14 | 2016-11-16 | 河北科技大学 | A kind of preparation method of waterproof thermal-insulated type lightweight regeneration aggregate |
| CN105461249A (en) * | 2016-02-01 | 2016-04-06 | 西安建筑科技大学 | Production technology and device for preparing recycled building materials through construction waste |
| CN106565121B (en) * | 2016-10-19 | 2019-01-22 | 山西省交通科学研究院 | A kind of waste and old cement concrete recycled aggregate surface treatment method |
| CN106565121A (en) * | 2016-10-19 | 2017-04-19 | 山西省交通科学研究院 | A surface treatment method for waste cement concrete regenerated aggregate |
| CN108947401A (en) * | 2018-08-16 | 2018-12-07 | 中建西部建设西南有限公司 | A kind of anti-block water permeable concrete |
| CN108947401B (en) * | 2018-08-16 | 2021-06-11 | 中建西部建设西南有限公司 | Anti-blocking water-permeable concrete |
| CN109053058A (en) * | 2018-10-15 | 2018-12-21 | 金陵科技学院 | The method for preparing high-performance building mortar using the artificial fine aggregate of solid waste |
| CN109748528A (en) * | 2019-02-22 | 2019-05-14 | 湖南鑫长胜材料科技有限公司 | A kind of regenerated aggregate hardening agent and enhanced processing method |
| CN110482895A (en) * | 2019-09-23 | 2019-11-22 | 广西壮族自治区水利科学研究院 | A kind of method of modifying of recycled aggregate |
| CN112374827A (en) * | 2020-09-16 | 2021-02-19 | 湖州上建华煜混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
| CN112321184A (en) * | 2020-11-16 | 2021-02-05 | 江苏金海宁新型建材科技有限公司 | Preparation method of recycled aggregate for prefabricated building |
| CN112624710A (en) * | 2021-01-15 | 2021-04-09 | 深圳市宝金华混凝土有限公司 | High-strength recycled concrete and preparation method thereof |
| CN113620668A (en) * | 2021-09-06 | 2021-11-09 | 深圳市永恒业混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
| CN113603430A (en) * | 2021-09-07 | 2021-11-05 | 河北金铎建设工程有限公司 | Thermal insulation wall protective layer dry material, mortar and wall |
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